Cytochromes of Aquatic Fungi

Abstract

The cytochrome systems of two classes of aquatic fungi, the Oomycetes and Chytridiomycetes , were studied by means of reduced-minus-oxidized difference spectra at room and at low temperature. At room temperature, all of these fungi have a c -type cytochrome with an absorption maximum at 551 mμ and a b -type cytochrome at 564 mμ. The Oomycetes have a -type cytochromes at 605 mμ, and the Chytridiomycetes have a -type cytochromes at 606 mμ ( Blastocladiales ) or at 609 mμ ( Monoblepharidales ). Additional b -type cytochromes are found at 557 mμ in the Oomycetes and at approximately 560 mμ in the Chytridiomycetes . The data obtained from spectra at low temperature are consistent with these conclusions. Thus, the difference spectra reveal variation between the cytochrome systems of these two classes of aquatic fungi.